CVE-2026-6210
HighCVSS 8.7Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image. The issue occurs when processing SVG marker references, where the renderer does not verify the node type before casting.
Risk Assessment
Exploitation of this vulnerability may lead to application crashes, resulting in denial of service. Organizations should be aware of the risks associated with processing unverified SVG images.
Recommendation
It is recommended to update Qt SVG to versions 6.8.8 or 6.11.1 and later to mitigate the risks associated with this vulnerability.
Other vulnerabilities in Qt SVG
See all- CVE-2026-8168High
Uncontrolled recursion in the SVG parser and renderer of the Qt SVG module (QtSvg) in Qt allows a crafted SVG file with deeply nested elements to cause stack exhaustion and application crash (denial of service).
- CVE-2025-14576High
Insufficient validation of node IDs in the Qt SVG module allows arbitrary QML/JavaScript code injection when loading malicious SVG files through the VectorImage component in Qt Quick. Although QML execution is typically more restricted than native code execution, this could still lead to denial of service, information disclosure, or other impacts depending on the application's privilege level and data access.
Original NVD description (English source)
A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image. When processing SVG marker references, the renderer retrieves a node by its id attribute and casts it to QSvgMarker* without verifying the node type. A non-marker element (such as a <line> element) that references itself as a marker triggers an out-of-bounds heap read due to the object size difference between QSvgLine and QSvgMarker, followed by an endless recursion that bypasses the marker recursion guard through incorrect virtual dispatch. The result is an application crash (denial of service). This issue affects Qt SVG: from 6.7.0 before 6.8.8, from 6.9.0 before 6.11.1.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS